code: def pser3(self):
      midx = pd.MultiIndex(
          [["koalas", "cow", "falcon"], ["speed", "weight", "length"]],
          [[0, 0, 0, 1, 1, 1, 2, 2, 2], [1, 1, 2, 0, 0, 2, 2, 2, 1]],
      )
      return pd.Series(
          [45, 200, 1.2, 30, 250, 1.5, 320, 1, 0.3], index=midx
      )
  
imports: import pandas
  from pyspark import pandas
  from pyspark.pandas.config import set_option, reset_option
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.testing.sqlutils import SQLTestUtils
label_desc: Use image node_id 9 for calling the AssignFrameMixin obj's underlying member method code with example usage: obj.pser3() and returns: pd